: Corners, behind doors, or just outside a bathroom are classic "low-guard" zones. Wait for them to be preoccupied (e.g., checking their phone).

: The best way to see what Boo can do is to look through its existing test cases on GitHub. They demonstrate almost all the language's "muscles."

A guide to Boo's metaprogramming and extensibility features?

If you're looking to give someone a fright, a successful "BOO!" is all about psychology and timing.